scholarly journals Seed orchard management and cultural options for quality seed production

1996 ◽  
Vol 72 (5) ◽  
pp. 467-467 ◽  
Author(s):  
G.-É. Caron ◽  
R. Smith ◽  
D. Kolotelo
Keyword(s):  
Seed Production ◽  
Seed Orchard ◽  
Orchard Management

Marginal analysis and cost effectiveness in seed orchard management

1987 ◽  
Vol 17 (6) ◽  
pp. 510-515 ◽  
Author(s):  
Thomas A. Thomson ◽  
Donald T. Lester ◽  
Jeanne A. Martin
Keyword(s):  
Seed Production ◽  
Analytical Techniques ◽  
Cost Effective ◽  
Seed Orchard ◽  
Induction Treatment ◽  
Marginal Analysis ◽  
Orchard Management ◽  
Improvement Programs ◽  
Four Quadrant ◽  
The Cost

We use marginal analysis for three seed orchard management decisions. First we consider the roguing of a seed orchard established with many untested trees. We show that inferior parents should be rogued to the point where the number of orchard trees times the average expected volume gain of trees from seed produced by that orchard is maximized. Marginal analysis also is useful where one must choose the number of trees to establish in an orchard planted after progeny tests have identified superior parents. The cost of establishing many ramets to meet early seed production goals can be balanced with the projected value of seed. For the example presented, an additional orchard tree is cost effective if its seed is needed at an orchard age of 12 to 15 years. Finally, we use marginal analysis to determine whether to induce a seed orchard to increase its seed production when there is an excess demand for seed. This decision is guided by balancing the cost of the induction treatment with the combined effect of expected increase in seed harvest, the amount of genetic gain, and the discount rate. We present a four-quadrant decision diagram for estimating this balance. In designing tree improvement programs, these analytical techniques can be applied to proposed alternatives as one way to structure decision making and to provide comparable economic assessments from which cost-effective choices can be made.

Cone and Seed Yields from Slash Pine Seed Orchards

1994 ◽  
Vol 18 (3) ◽  
pp. 122-127 ◽  
Author(s):  
Gregory L. Powell ◽  
Timothy L. White
Keyword(s):  
Seed Production ◽  
Seed Orchard ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Recording System ◽  
Yield Data ◽  
Seed Orchards ◽  
Orchard Management ◽  
Intensively Managed ◽  
Seed Yields

Abstract The Cooperative Forest Genetics Research Program (CFGRP) initiated a slash pine (Pinus elliottii Engelm. var. elliottii) seed orchard management recording system (SOMRS) in 1985 to quantify cone and seed yields of slash pine orchards in the cooperative program. First, historical data were obtained from CFGRP slash pine seed orchards. Secondly, starting in 1985, cultural treatments and production yield data have been collected annually from 56 slash pine seed orchards located throughout Florida, Georgia, and Alabama. The vast majority of these orchards are intensively managed for seed production including the use of fertilizer, herbicide, and up to 10 applications of insecticide annually. From 1980 through 1990, the average seed yield from mature orchards (orchards greater than 14 yr old) was 25.1 bushels of cones, and 27.3 lb of seed/ac. For pounds per acre, orchards reach 50% and 90% of full production at ages 11 and 18 yr from grafting, respectively. The use of insecticides in slash pine seed orchards approximately doubles orchard yields. The CFGRP slash pine seed orchard management recording system (SOMRS) can aid orchard managers in determining factors that limit or promote seed production. South. J. Appl. For. 18(3):122-127.

A Canadian Example of Government-Industry Collaboration In Tree Improvement

1976 ◽  
Vol 52 (6) ◽  
pp. 283-289 ◽  
Author(s):  
C. W. Yeatman
Keyword(s):  
Seed Production ◽  
Cold Hardiness ◽  
Seed Orchard ◽  
Jack Pine ◽  
Tree Improvement ◽  
Seed Sources ◽  
Seedling Seed Orchard ◽  
Forest Region ◽  
Future Supply ◽  
High Quality Seed

A program of provenance testing, seed production and genetic improvement of jack pine was developed in the Baskatong region of western Quebec through sustained collaboration among government forest services and forest industry. Research plantations demonstrated, within a period of 10 years from establishment, the superiority in growth, cold hardiness and disease resistance of regionally adapted local seed sources. Critical differences were evident between provenances from the Boreal Forest Region and those from the adjacent Sections of the Great Lakes — St. Lawrence Forest Region.A 300-acre (120 ha) seed production area was created within a genetically superior jack pine population of natural origin in the Côte Jaune area west of Lake Baskatong. Within this population, 325 plus trees were selected, marked and recorded over two years by student crews employed in the summer. Seed harvested from the felled plus trees will be used to create a seedling seed orchard and to establish progeny tests. The plus trees are to be grafted for controlled breeding among selected progeny-tested clones at a later date. This cooperative program of tree improvement will ensure the future supply of high quality seed that will maintain and enhance the value of the forest resource.

Seed and cone production in a clonal orchard of jack pine (Pinusbanksiana)

1981 ◽  
Vol 11 (3) ◽  
pp. 512-516 ◽  
Author(s):  
Michael N. Todhunter ◽  
R. Brooks Polk
Keyword(s):  
Seed Production ◽  
Seed Orchard ◽  
Jack Pine ◽  
Cone Production ◽  
Total Seed

Seed and cone production in Pinusbanksiana Lamb. was studied using clonal material. Variables studied included sound seed per cone, sound seed percentage, seed efficiency, total seed per cone, seed potential, and total number of cones in relation to site, clone, and position in the crown. The clonal effect was highly significant for all variables. Site and crown location were significant for all but seed total and number of cones. Due to the variability present, cone and seed production should be taken into account in seed orchard design, tree selection, and breeding.

Preliminary Performance of the Computerized Inventory-Monitoring System for Pine Seed Orchards

1985 ◽  
Vol 9 (3) ◽  
pp. 173-176
Author(s):  
Scott A. Merkle ◽  
Peter P. Feret ◽  
David L. Bramlett
Keyword(s):  
Pinus Taeda ◽  
Monitoring System ◽  
Loblolly Pine ◽  
Management Practices ◽  
Predictive Accuracy ◽  
Predictive Performance ◽  
Seed Orchard ◽  
Productivity Data ◽  
Orchard Management ◽  
Sources Of Variation

Abstract A seed orchard Inventory-Monitoring System (IMS) and companion computer program were tested for predictive accuracy and monitoring effectiveness in an operational loblolly pine (Pinus taeda) seed orchard. The IMS was used to predict 1980 and 1981 cone harvests by tracking the survival of strobili on sample trees representing each producing clone in the orchard. The 1980 cone harvest was substantially overestimated, possibly due to the use of generalized cone efficiency estimates. Predictions for the 1981 cone harvest, made with the benefit of clonal cone efficiency estimates from the 1980 crop, were much more accurate, under-estimating the actual harvest by as little as 5%.Predictive performance of the IMS is expected to improve with accumulation of productivity data for each clone and with the reduction of nonclonal sources of variation resulting from improved orchard management practices. Seed orchard-to-nursery efficiency (SO-NE) data from the system's monitoring function showed that low SO-NE values for the orchard of 22 % in 1980 and 24 % in 1981 were due mainly to low cone efficiency and low seed efficiency.2

Evaluation of seed production in a first-generation seed orchard of Chinese pine (Pinus tabuliformis)

2016 ◽  
Vol 27 (5) ◽  
pp. 1003-1008 ◽  
Author(s):  
Huwei Yuan ◽  
Shihui Niu ◽  
Xianqing Zhou ◽  
Qingping Du ◽  
Yue Li ◽  
...  
Keyword(s):  
Seed Production ◽  
First Generation ◽  
Seed Orchard ◽  
Chinese Pine ◽  
Pinus Tabuliformis

How seed orchard culture affects seed quality: Experience with the southern pines

1996 ◽  
Vol 72 (5) ◽  
pp. 469-473 ◽  
Author(s):  
J. P. Barnett
Keyword(s):  
Seed Germination ◽  
Seed Dormancy ◽  
Loblolly Pine ◽  
Management Practices ◽  
Seed Quality ◽  
Seed Storage ◽  
Seed Orchard ◽  
Orchard Management ◽  
Improvement Programs ◽  
Pinus Spp

Tree improvement programs have influenced significantly the quality of southern pine seeds produced when compared to collections from native stands. Seed orchard management practices such as fertilization can increase seed size and reduce seed dormancy. These result in the need for less complex pregermination treatments. Repeated cone collections from the same clones facilitate collections according to ripening (cone specific gravity), which can improve seed germination and storage. However, cultural practices may result in seed properties that are more sensitive to damage during processing procedures and result in lower quality unless special care is provided during this stage of handling. The effect of orchard management practices on seed quality also varies by species, with loblolly pine being less affected than longleaf pine. Key words: Pinus spp., seed germination, seed dormancy, seed storage, cone maturity

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